dede联动菜单无法添加二级选择

else if($action=='addenum_save')      {        if(empty($ename) || empty($egroup))         {               Showmsg("类别名称或组名称不能为空！","-1");               exit();          }          if($issign == 1 || $topvalue == 0)          {              $enames = explode(',', $ename);              foreach($enames as $ename)              {                  $arr = $dsql->GetOne("SELECT * FROM `dede_sys_enum` WHERE egroup='$egroup' AND (evalue MOD 500)=0 ORDER BY disorder DESC ");                  if(!is_array($arr)) $disorder = $evalue = ($issign==1 ? 1 : 500);                  else $disorder = $evalue = $arr['disorder'] + ($issign==1 ? 1 : 500);                                        $dsql->ExecuteNoneQuery("INSERT INTO `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)                                           VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ");               }              WriteEnumsCache($egroup);                                                                        ShowMsg("成功添加枚举分类！".$dsql->GetError(), $ENV_GOBACK_URL);              exit();          } else if ($issign == 3 && $topvalue != 0)          {              $minid = $topvalue;              $maxnum = 500; // 三级子类最多500个              $enames = explode(',', $ename);              foreach ($enames as $ename)              {                  $arr = $dsql->GetOne("SELECT * FROM `dede_sys_enum` WHERE egroup='$egroup' AND evalue LIKE '$topvalue.%%%' ORDER BY evalue DESC ");                  if(!is_array($arr))                  {                      $disorder = $minid;                      $evalue = $minid.'.001';                  }                  else                  {                      $disorder = $minid;                      preg_match("#([0-9]{1,})/.([0-9]{1,})#", $arr['evalue'], $matchs);                      $addvalue = $matchs[2] + 1;                      $addvalue = sprintf("%03d", $addvalue);                      $evalue = $matchs[1].'.'.$addvalue;                  }                  $sql = "INSERT INTO `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)                                           VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ";                  // echo $sql;exit;                  $dsql->ExecuteNoneQuery($sql);               }              // echo $minid;              WriteEnumsCache($egroup);              ShowMsg("成功添加枚举分类！".$issign, $ENV_GOBACK_URL);              exit();          } else {         $minid = $topvalue;         $maxid = $topvalue + 500;         $enames = explode(',', $ename);            foreach($enames as $ename)            {          $arr = $dsql->GetOne("Select * From `dede_sys_enum` where egroup='$egroup' And evalue>$minid And evalue<$maxid order by evalue desc ");          if(!is_array($arr))          {           $disorder = $evalue = $minid+1;          }          else          {           $disorder = $arr['disorder']+1;           $evalue = (int)($arr['evalue']+1);          }          $dsql->ExecuteNoneQuery("Insert into `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)                                       values('$ename','$evalue','$egroup','$disorder','$issign'); ");             }             WriteEnumsCache($egroup);         ShowMsg("成功添加枚举分类！".$issign, $ENV_GOBACK_URL);         exit();       }      }

以上这样修改后1,2,3 联动能添加，再4级就不行了。应为这里的标记只判断到3，织梦也最多能添加3级联动。所以足够用了。